org.apache.commons.collections4.queue
Class UnmodifiableQueue<E>
java.lang.Object
org.apache.commons.collections4.collection.AbstractCollectionDecorator<E>
org.apache.commons.collections4.queue.AbstractQueueDecorator<E>
org.apache.commons.collections4.queue.UnmodifiableQueue<E>
- All Implemented Interfaces:
- Serializable, Iterable<E>, Collection<E>, Queue<E>, Unmodifiable
public final class UnmodifiableQueue<E>
- extends AbstractQueueDecorator<E>
- implements Unmodifiable, Serializable
Decorates another Queue
to ensure it can't be altered.
Attempts to modify it will result in an UnsupportedOperationException.
- Since:
- 4.0
- Version:
- $Id: UnmodifiableQueue.java 1494280 2013-06-18 20:07:04Z tn $
- See Also:
- Serialized Form
unmodifiableQueue
public static <E> Queue<E> unmodifiableQueue(Queue<E> queue)
- Factory method to create an unmodifiable queue.
If the queue passed in is already unmodifiable, it is returned.
- Type Parameters:
E
- the type of the elements in the queue- Parameters:
queue
- the queue to decorate, must not be null
- Returns:
- an unmodifiable Queue
- Throws:
IllegalArgumentException
- if queue is null
iterator
public Iterator<E> iterator()
- Specified by:
iterator
in interface Iterable<E>
- Specified by:
iterator
in interface Collection<E>
- Overrides:
iterator
in class AbstractCollectionDecorator<E>
add
public boolean add(Object object)
- Specified by:
add
in interface Collection<E>
- Overrides:
add
in class AbstractCollectionDecorator<E>
addAll
public boolean addAll(Collection<? extends E> coll)
- Specified by:
addAll
in interface Collection<E>
- Overrides:
addAll
in class AbstractCollectionDecorator<E>
clear
public void clear()
- Specified by:
clear
in interface Collection<E>
- Overrides:
clear
in class AbstractCollectionDecorator<E>
remove
public boolean remove(Object object)
- Specified by:
remove
in interface Collection<E>
- Overrides:
remove
in class AbstractCollectionDecorator<E>
removeAll
public boolean removeAll(Collection<?> coll)
- Specified by:
removeAll
in interface Collection<E>
- Overrides:
removeAll
in class AbstractCollectionDecorator<E>
retainAll
public boolean retainAll(Collection<?> coll)
- Specified by:
retainAll
in interface Collection<E>
- Overrides:
retainAll
in class AbstractCollectionDecorator<E>
offer
public boolean offer(E obj)
- Specified by:
offer
in interface Queue<E>
- Overrides:
offer
in class AbstractQueueDecorator<E>
poll
public E poll()
- Specified by:
poll
in interface Queue<E>
- Overrides:
poll
in class AbstractQueueDecorator<E>
remove
public E remove()
- Specified by:
remove
in interface Queue<E>
- Overrides:
remove
in class AbstractQueueDecorator<E>
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